Chetyre, Tri, Dva, Odin....
The words of the last seconds of the Russian countdown to the launch of Soyuz at 1.20 - the first Soviet blast-off to be televised live around the world.
On board, 41-year-old Air Force Colonel Alexei Leonov who was, back in 1965, the first man ever to walk in space; and Valeri Nikolayevich Kubasov, a civilian also making his second spaceflight.

James Burke presents the events and all the background from the London Space Studio, with reports from Michael Charlton in Moscow, Richard Lindley in Cape Kennedy